Screen for projecting machines



uy 26, 1932. E, E WAGNER 1,868,551

SCREEN FOR PROJECTING MACHINES Filed Jan. 20, '1930 2 Sheets-Sheet l l//; /Il v JSZNO 9 I .[45 Mey/wf O L e INVENTon BY @m41 v www5? n-TCHQNEYY July 26, 1932. E, E, WAGNER 1,868,551

SCREEN FOR PROJECTING MACHINES Filed Jan. 20, 1930 2 SheebSFSheet 2 INVENTOR ATTORNEY Patented July 26, 1932 f UNITED STATES EMANUEL E. WAGNER, F LAMAR, MISSOURI SCREEN FOR PROJECTING MACHINES Application led January 20, 1930. Serial No. 422,119.

The object of this invention is to provide a screen on which or through which pictures and advertising matter may be projected, the screen having particular features of construction whereby it is adapted for outdoor use and especially for use on the same building where the projecting machine is located. A further object is to provide improved means for holding the screen in proper position, these means including wires or the like adapted to be secured to the framework in the particular manner indicated below.

A further object is to provide means for securing the fabric and adjustable means .15 for securing and tensioning the wires, the means last named also aiding directly if desired in securing the screen.

With the foregoing and other objects in View, the invention consists in the novel construction and arrangement of elements described, illustrated, and claimed, it being understood that modifications may be made within the scope of the claims without departing from the spirit of the invention.

In the drawings:

Fig. 1 is an elevation of the screen.

Fig. 2 shows a portion of the other side of the screen.

Fig. 3 is a transverse section.

Fig. 4 is a section through a frame member.

Fig. 5 shows a modified form.

Fig. 6 is a section in line 6 6 Fig. 5 and Figs. 7-11 show different forms of retaining means for the wires and the screen.

In the primary form of the device, a rectangular frame includes the vertical or side elements 10 and 11, the upper horizontal element 12 and the lower horizontal member 13. These members are secured together with their fiat sides or surfaces in corresponding planes, and they are braced in a suitable manner, corner blocks 14 being employed if desired.

The fabric 15 extends across the elements of the frame, and engages pins 16, which are deflected outwardly for the purpose of retaining the fabric, and if the inclined position is produced or made effective, along one edge, after the other edge is secured, moderatc stretching will result.

, In order to hold the fabric in proper position regardless of air currents (in outdoor use), wires 17 and 18 extend across one side 66 of the fabric and in a direction perpendicular to each other, and wires 19 and 2O extend across the remaining side, and are to be secured and tensioned.

In the primary form of construction, the wires are twisted around the pins and may be so positioned that some tension will be produced when the pins are deflected outwardly. This effect may be increased by producing a special offset in the pins or some of them, or by employing anv element which will slightly space the wires outwardly from the frame.

In a further or modied form, illustrated in Figure 11, I provide screws 2O having 70 transverse holes 21 therein, and the wires pass through the holes and around the screws. The screws may also pass through the fabric, aiding in retaining the latter. The wires on opposite sides of the screen may run to al- 5" ternate screws, or may run in pairs to individual screws. The heads of the screws have slots 22, for obvious use, or the heads may have angular portions, in the form of sockets or otherwise, for engagement by a suitable tool. Pins 16 are also used in connectionlwith the screws, unless reliance is placed. in some cases, only on the wires and the screws passing therethrough.

What I claim is:

1. In a projection screen, a frame, a fabric extending across the frame, wires extending between opposite elements of the frame and adjacent to the surface of the fabric, and devices for securing said fabric and wires, these devices comprising pins projecting into the frame and deflected toward adjacent outer edges of the frame, said pins including end portions producing direct crank action on the wires.

2. In a projection screen, a frame, a fabric extending across the frame, wires extending between opposite elements of the frame and adjacent to opposite surfaces of the fabric, and outwardly deflected pins, the wires be ing twisted around the pins and being tensioned by the latter, said pins including end portions producing direct crank action on the Wires.

3. A projection screen comprising the structure of claim 2, in which the means for j tensioning the Wires pass through the fabric.

4. A projection screen comprising the structure of clalm 2, 1n Which the means for tensioning the Wires have positive engage-l ment, laterally of their Shanks, with lthe frame.

5. In a projection screen, a frame, flexiblev fabricated means extending across the frame, and securing means entering said frame and including rotatable devices formed with portions for connection and veective tensioning contact With the flexible means by direct crank action thereon at a point laterally of an axis of rotation ofsaid securingmeans.

In testimony whereof I affix my sivnature.

EMANUEL E.. WAevER, 

